@article{10_26493_1855_3974_600_5d2,
     author = {Aubrey Blecher and Charlotte Brennan and Arnold Knopfmacher},
     title = {
		{Levels} in bargraphs
	},
     journal = {Ars Mathematica Contemporanea},
     pages = {287--300},
     publisher = {mathdoc},
     volume = {9},
     number = {2},
     year = {2015},
     doi = {10.26493/1855-3974.600.5d2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.26493/1855-3974.600.5d2/}
}